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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | * | |
26 | */ | |
27 | ||
28 | #include <linux/config.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
40 | #include <acpi/acpi.h> | |
41 | #include <asm/io.h> | |
42 | #include <acpi/acpi_bus.h> | |
43 | #include <acpi/processor.h> | |
44 | #include <asm/uaccess.h> | |
45 | ||
46 | #include <linux/efi.h> | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_OS_SERVICES | |
50 | ACPI_MODULE_NAME ("osl") | |
51 | ||
52 | #define PREFIX "ACPI: " | |
53 | ||
54 | struct acpi_os_dpc | |
55 | { | |
56 | acpi_osd_exec_callback function; | |
57 | void *context; | |
58 | }; | |
59 | ||
60 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
61 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
62 | #endif | |
63 | ||
64 | #ifdef ENABLE_DEBUGGER | |
65 | #include <linux/kdb.h> | |
66 | ||
67 | /* stuff for debugger support */ | |
68 | int acpi_in_debugger; | |
69 | EXPORT_SYMBOL(acpi_in_debugger); | |
70 | ||
71 | extern char line_buf[80]; | |
72 | #endif /*ENABLE_DEBUGGER*/ | |
73 | ||
fb9802fa LY |
74 | int acpi_specific_hotkey_enabled; |
75 | EXPORT_SYMBOL(acpi_specific_hotkey_enabled); | |
76 | ||
1da177e4 LT |
77 | static unsigned int acpi_irq_irq; |
78 | static acpi_osd_handler acpi_irq_handler; | |
79 | static void *acpi_irq_context; | |
80 | static struct workqueue_struct *kacpid_wq; | |
81 | ||
82 | acpi_status | |
83 | acpi_os_initialize(void) | |
84 | { | |
85 | return AE_OK; | |
86 | } | |
87 | ||
88 | acpi_status | |
89 | acpi_os_initialize1(void) | |
90 | { | |
91 | /* | |
92 | * Initialize PCI configuration space access, as we'll need to access | |
93 | * it while walking the namespace (bus 0 and root bridges w/ _BBNs). | |
94 | */ | |
95 | #ifdef CONFIG_ACPI_PCI | |
96 | if (!raw_pci_ops) { | |
97 | printk(KERN_ERR PREFIX "Access to PCI configuration space unavailable\n"); | |
98 | return AE_NULL_ENTRY; | |
99 | } | |
100 | #endif | |
101 | kacpid_wq = create_singlethread_workqueue("kacpid"); | |
102 | BUG_ON(!kacpid_wq); | |
103 | ||
104 | return AE_OK; | |
105 | } | |
106 | ||
107 | acpi_status | |
108 | acpi_os_terminate(void) | |
109 | { | |
110 | if (acpi_irq_handler) { | |
111 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
112 | acpi_irq_handler); | |
113 | } | |
114 | ||
115 | destroy_workqueue(kacpid_wq); | |
116 | ||
117 | return AE_OK; | |
118 | } | |
119 | ||
120 | void | |
121 | acpi_os_printf(const char *fmt,...) | |
122 | { | |
123 | va_list args; | |
124 | va_start(args, fmt); | |
125 | acpi_os_vprintf(fmt, args); | |
126 | va_end(args); | |
127 | } | |
128 | EXPORT_SYMBOL(acpi_os_printf); | |
129 | ||
130 | void | |
131 | acpi_os_vprintf(const char *fmt, va_list args) | |
132 | { | |
133 | static char buffer[512]; | |
134 | ||
135 | vsprintf(buffer, fmt, args); | |
136 | ||
137 | #ifdef ENABLE_DEBUGGER | |
138 | if (acpi_in_debugger) { | |
139 | kdb_printf("%s", buffer); | |
140 | } else { | |
141 | printk("%s", buffer); | |
142 | } | |
143 | #else | |
144 | printk("%s", buffer); | |
145 | #endif | |
146 | } | |
147 | ||
11e981f1 | 148 | extern int acpi_in_resume; |
1da177e4 LT |
149 | void * |
150 | acpi_os_allocate(acpi_size size) | |
151 | { | |
11e981f1 DSL |
152 | if (acpi_in_resume) |
153 | return kmalloc(size, GFP_ATOMIC); | |
154 | else | |
155 | return kmalloc(size, GFP_KERNEL); | |
1da177e4 LT |
156 | } |
157 | ||
158 | void | |
159 | acpi_os_free(void *ptr) | |
160 | { | |
161 | kfree(ptr); | |
162 | } | |
163 | EXPORT_SYMBOL(acpi_os_free); | |
164 | ||
165 | acpi_status | |
166 | acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr) | |
167 | { | |
168 | if (efi_enabled) { | |
169 | addr->pointer_type = ACPI_PHYSICAL_POINTER; | |
170 | if (efi.acpi20) | |
171 | addr->pointer.physical = | |
172 | (acpi_physical_address) virt_to_phys(efi.acpi20); | |
173 | else if (efi.acpi) | |
174 | addr->pointer.physical = | |
175 | (acpi_physical_address) virt_to_phys(efi.acpi); | |
176 | else { | |
177 | printk(KERN_ERR PREFIX "System description tables not found\n"); | |
178 | return AE_NOT_FOUND; | |
179 | } | |
180 | } else { | |
181 | if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) { | |
182 | printk(KERN_ERR PREFIX "System description tables not found\n"); | |
183 | return AE_NOT_FOUND; | |
184 | } | |
185 | } | |
186 | ||
187 | return AE_OK; | |
188 | } | |
189 | ||
190 | acpi_status | |
191 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size, void __iomem **virt) | |
192 | { | |
193 | if (efi_enabled) { | |
194 | if (EFI_MEMORY_WB & efi_mem_attributes(phys)) { | |
195 | *virt = (void __iomem *) phys_to_virt(phys); | |
196 | } else { | |
197 | *virt = ioremap(phys, size); | |
198 | } | |
199 | } else { | |
200 | if (phys > ULONG_MAX) { | |
201 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
202 | return AE_BAD_PARAMETER; | |
203 | } | |
204 | /* | |
205 | * ioremap checks to ensure this is in reserved space | |
206 | */ | |
207 | *virt = ioremap((unsigned long) phys, size); | |
208 | } | |
209 | ||
210 | if (!*virt) | |
211 | return AE_NO_MEMORY; | |
212 | ||
213 | return AE_OK; | |
214 | } | |
215 | ||
216 | void | |
217 | acpi_os_unmap_memory(void __iomem *virt, acpi_size size) | |
218 | { | |
219 | iounmap(virt); | |
220 | } | |
221 | ||
222 | #ifdef ACPI_FUTURE_USAGE | |
223 | acpi_status | |
224 | acpi_os_get_physical_address(void *virt, acpi_physical_address *phys) | |
225 | { | |
226 | if(!phys || !virt) | |
227 | return AE_BAD_PARAMETER; | |
228 | ||
229 | *phys = virt_to_phys(virt); | |
230 | ||
231 | return AE_OK; | |
232 | } | |
233 | #endif | |
234 | ||
235 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
236 | ||
237 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
238 | ||
239 | acpi_status | |
240 | acpi_os_predefined_override (const struct acpi_predefined_names *init_val, | |
241 | acpi_string *new_val) | |
242 | { | |
243 | if (!init_val || !new_val) | |
244 | return AE_BAD_PARAMETER; | |
245 | ||
246 | *new_val = NULL; | |
247 | if (!memcmp (init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { | |
248 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", | |
249 | acpi_os_name); | |
250 | *new_val = acpi_os_name; | |
251 | } | |
252 | ||
253 | return AE_OK; | |
254 | } | |
255 | ||
256 | acpi_status | |
257 | acpi_os_table_override (struct acpi_table_header *existing_table, | |
258 | struct acpi_table_header **new_table) | |
259 | { | |
260 | if (!existing_table || !new_table) | |
261 | return AE_BAD_PARAMETER; | |
262 | ||
263 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
264 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
265 | *new_table = (struct acpi_table_header*)AmlCode; | |
266 | else | |
267 | *new_table = NULL; | |
268 | #else | |
269 | *new_table = NULL; | |
270 | #endif | |
271 | return AE_OK; | |
272 | } | |
273 | ||
274 | static irqreturn_t | |
275 | acpi_irq(int irq, void *dev_id, struct pt_regs *regs) | |
276 | { | |
277 | return (*acpi_irq_handler)(acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; | |
278 | } | |
279 | ||
280 | acpi_status | |
281 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, void *context) | |
282 | { | |
283 | unsigned int irq; | |
284 | ||
285 | /* | |
286 | * Ignore the GSI from the core, and use the value in our copy of the | |
287 | * FADT. It may not be the same if an interrupt source override exists | |
288 | * for the SCI. | |
289 | */ | |
290 | gsi = acpi_fadt.sci_int; | |
291 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { | |
292 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
293 | gsi); | |
294 | return AE_OK; | |
295 | } | |
296 | ||
297 | acpi_irq_handler = handler; | |
298 | acpi_irq_context = context; | |
299 | if (request_irq(irq, acpi_irq, SA_SHIRQ, "acpi", acpi_irq)) { | |
300 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); | |
301 | return AE_NOT_ACQUIRED; | |
302 | } | |
303 | acpi_irq_irq = irq; | |
304 | ||
305 | return AE_OK; | |
306 | } | |
307 | ||
308 | acpi_status | |
309 | acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) | |
310 | { | |
311 | if (irq) { | |
312 | free_irq(irq, acpi_irq); | |
313 | acpi_irq_handler = NULL; | |
314 | acpi_irq_irq = 0; | |
315 | } | |
316 | ||
317 | return AE_OK; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Running in interpreter thread context, safe to sleep | |
322 | */ | |
323 | ||
324 | void | |
325 | acpi_os_sleep(acpi_integer ms) | |
326 | { | |
327 | current->state = TASK_INTERRUPTIBLE; | |
328 | schedule_timeout(((signed long) ms * HZ) / 1000); | |
329 | } | |
330 | EXPORT_SYMBOL(acpi_os_sleep); | |
331 | ||
332 | void | |
333 | acpi_os_stall(u32 us) | |
334 | { | |
335 | while (us) { | |
336 | u32 delay = 1000; | |
337 | ||
338 | if (delay > us) | |
339 | delay = us; | |
340 | udelay(delay); | |
341 | touch_nmi_watchdog(); | |
342 | us -= delay; | |
343 | } | |
344 | } | |
345 | EXPORT_SYMBOL(acpi_os_stall); | |
346 | ||
347 | /* | |
348 | * Support ACPI 3.0 AML Timer operand | |
349 | * Returns 64-bit free-running, monotonically increasing timer | |
350 | * with 100ns granularity | |
351 | */ | |
352 | u64 | |
353 | acpi_os_get_timer (void) | |
354 | { | |
355 | static u64 t; | |
356 | ||
357 | #ifdef CONFIG_HPET | |
358 | /* TBD: use HPET if available */ | |
359 | #endif | |
360 | ||
361 | #ifdef CONFIG_X86_PM_TIMER | |
362 | /* TBD: default to PM timer if HPET was not available */ | |
363 | #endif | |
364 | if (!t) | |
365 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
366 | ||
367 | return ++t; | |
368 | } | |
369 | ||
370 | acpi_status | |
371 | acpi_os_read_port( | |
372 | acpi_io_address port, | |
373 | u32 *value, | |
374 | u32 width) | |
375 | { | |
376 | u32 dummy; | |
377 | ||
378 | if (!value) | |
379 | value = &dummy; | |
380 | ||
381 | switch (width) | |
382 | { | |
383 | case 8: | |
384 | *(u8*) value = inb(port); | |
385 | break; | |
386 | case 16: | |
387 | *(u16*) value = inw(port); | |
388 | break; | |
389 | case 32: | |
390 | *(u32*) value = inl(port); | |
391 | break; | |
392 | default: | |
393 | BUG(); | |
394 | } | |
395 | ||
396 | return AE_OK; | |
397 | } | |
398 | EXPORT_SYMBOL(acpi_os_read_port); | |
399 | ||
400 | acpi_status | |
401 | acpi_os_write_port( | |
402 | acpi_io_address port, | |
403 | u32 value, | |
404 | u32 width) | |
405 | { | |
406 | switch (width) | |
407 | { | |
408 | case 8: | |
409 | outb(value, port); | |
410 | break; | |
411 | case 16: | |
412 | outw(value, port); | |
413 | break; | |
414 | case 32: | |
415 | outl(value, port); | |
416 | break; | |
417 | default: | |
418 | BUG(); | |
419 | } | |
420 | ||
421 | return AE_OK; | |
422 | } | |
423 | EXPORT_SYMBOL(acpi_os_write_port); | |
424 | ||
425 | acpi_status | |
426 | acpi_os_read_memory( | |
427 | acpi_physical_address phys_addr, | |
428 | u32 *value, | |
429 | u32 width) | |
430 | { | |
431 | u32 dummy; | |
432 | void __iomem *virt_addr; | |
433 | int iomem = 0; | |
434 | ||
435 | if (efi_enabled) { | |
436 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
437 | /* HACK ALERT! We can use readb/w/l on real memory too.. */ | |
438 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
439 | } else { | |
440 | iomem = 1; | |
441 | virt_addr = ioremap(phys_addr, width); | |
442 | } | |
443 | } else | |
444 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
445 | if (!value) | |
446 | value = &dummy; | |
447 | ||
448 | switch (width) { | |
449 | case 8: | |
450 | *(u8*) value = readb(virt_addr); | |
451 | break; | |
452 | case 16: | |
453 | *(u16*) value = readw(virt_addr); | |
454 | break; | |
455 | case 32: | |
456 | *(u32*) value = readl(virt_addr); | |
457 | break; | |
458 | default: | |
459 | BUG(); | |
460 | } | |
461 | ||
462 | if (efi_enabled) { | |
463 | if (iomem) | |
464 | iounmap(virt_addr); | |
465 | } | |
466 | ||
467 | return AE_OK; | |
468 | } | |
469 | ||
470 | acpi_status | |
471 | acpi_os_write_memory( | |
472 | acpi_physical_address phys_addr, | |
473 | u32 value, | |
474 | u32 width) | |
475 | { | |
476 | void __iomem *virt_addr; | |
477 | int iomem = 0; | |
478 | ||
479 | if (efi_enabled) { | |
480 | if (EFI_MEMORY_WB & efi_mem_attributes(phys_addr)) { | |
481 | /* HACK ALERT! We can use writeb/w/l on real memory too */ | |
482 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
483 | } else { | |
484 | iomem = 1; | |
485 | virt_addr = ioremap(phys_addr, width); | |
486 | } | |
487 | } else | |
488 | virt_addr = (void __iomem *) phys_to_virt(phys_addr); | |
489 | ||
490 | switch (width) { | |
491 | case 8: | |
492 | writeb(value, virt_addr); | |
493 | break; | |
494 | case 16: | |
495 | writew(value, virt_addr); | |
496 | break; | |
497 | case 32: | |
498 | writel(value, virt_addr); | |
499 | break; | |
500 | default: | |
501 | BUG(); | |
502 | } | |
503 | ||
504 | if (iomem) | |
505 | iounmap(virt_addr); | |
506 | ||
507 | return AE_OK; | |
508 | } | |
509 | ||
510 | #ifdef CONFIG_ACPI_PCI | |
511 | ||
512 | acpi_status | |
513 | acpi_os_read_pci_configuration (struct acpi_pci_id *pci_id, u32 reg, void *value, u32 width) | |
514 | { | |
515 | int result, size; | |
516 | ||
517 | if (!value) | |
518 | return AE_BAD_PARAMETER; | |
519 | ||
520 | switch (width) { | |
521 | case 8: | |
522 | size = 1; | |
523 | break; | |
524 | case 16: | |
525 | size = 2; | |
526 | break; | |
527 | case 32: | |
528 | size = 4; | |
529 | break; | |
530 | default: | |
531 | return AE_ERROR; | |
532 | } | |
533 | ||
534 | BUG_ON(!raw_pci_ops); | |
535 | ||
536 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
537 | PCI_DEVFN(pci_id->device, pci_id->function), | |
538 | reg, size, value); | |
539 | ||
540 | return (result ? AE_ERROR : AE_OK); | |
541 | } | |
542 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); | |
543 | ||
544 | acpi_status | |
545 | acpi_os_write_pci_configuration (struct acpi_pci_id *pci_id, u32 reg, acpi_integer value, u32 width) | |
546 | { | |
547 | int result, size; | |
548 | ||
549 | switch (width) { | |
550 | case 8: | |
551 | size = 1; | |
552 | break; | |
553 | case 16: | |
554 | size = 2; | |
555 | break; | |
556 | case 32: | |
557 | size = 4; | |
558 | break; | |
559 | default: | |
560 | return AE_ERROR; | |
561 | } | |
562 | ||
563 | BUG_ON(!raw_pci_ops); | |
564 | ||
565 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
566 | PCI_DEVFN(pci_id->device, pci_id->function), | |
567 | reg, size, value); | |
568 | ||
569 | return (result ? AE_ERROR : AE_OK); | |
570 | } | |
571 | ||
572 | /* TODO: Change code to take advantage of driver model more */ | |
573 | static void | |
574 | acpi_os_derive_pci_id_2 ( | |
575 | acpi_handle rhandle, /* upper bound */ | |
576 | acpi_handle chandle, /* current node */ | |
577 | struct acpi_pci_id **id, | |
578 | int *is_bridge, | |
579 | u8 *bus_number) | |
580 | { | |
581 | acpi_handle handle; | |
582 | struct acpi_pci_id *pci_id = *id; | |
583 | acpi_status status; | |
584 | unsigned long temp; | |
585 | acpi_object_type type; | |
586 | u8 tu8; | |
587 | ||
588 | acpi_get_parent(chandle, &handle); | |
589 | if (handle != rhandle) { | |
590 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, bus_number); | |
591 | ||
592 | status = acpi_get_type(handle, &type); | |
593 | if ( (ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE) ) | |
594 | return; | |
595 | ||
596 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &temp); | |
597 | if (ACPI_SUCCESS(status)) { | |
598 | pci_id->device = ACPI_HIWORD (ACPI_LODWORD (temp)); | |
599 | pci_id->function = ACPI_LOWORD (ACPI_LODWORD (temp)); | |
600 | ||
601 | if (*is_bridge) | |
602 | pci_id->bus = *bus_number; | |
603 | ||
604 | /* any nicer way to get bus number of bridge ? */ | |
605 | status = acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, 8); | |
606 | if (ACPI_SUCCESS(status) && | |
607 | ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
608 | status = acpi_os_read_pci_configuration(pci_id, 0x18, &tu8, 8); | |
609 | if (!ACPI_SUCCESS(status)) { | |
610 | /* Certainly broken... FIX ME */ | |
611 | return; | |
612 | } | |
613 | *is_bridge = 1; | |
614 | pci_id->bus = tu8; | |
615 | status = acpi_os_read_pci_configuration(pci_id, 0x19, &tu8, 8); | |
616 | if (ACPI_SUCCESS(status)) { | |
617 | *bus_number = tu8; | |
618 | } | |
619 | } else | |
620 | *is_bridge = 0; | |
621 | } | |
622 | } | |
623 | } | |
624 | ||
625 | void | |
626 | acpi_os_derive_pci_id ( | |
627 | acpi_handle rhandle, /* upper bound */ | |
628 | acpi_handle chandle, /* current node */ | |
629 | struct acpi_pci_id **id) | |
630 | { | |
631 | int is_bridge = 1; | |
632 | u8 bus_number = (*id)->bus; | |
633 | ||
634 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
635 | } | |
636 | ||
637 | #else /*!CONFIG_ACPI_PCI*/ | |
638 | ||
639 | acpi_status | |
640 | acpi_os_write_pci_configuration ( | |
641 | struct acpi_pci_id *pci_id, | |
642 | u32 reg, | |
643 | acpi_integer value, | |
644 | u32 width) | |
645 | { | |
646 | return AE_SUPPORT; | |
647 | } | |
648 | ||
649 | acpi_status | |
650 | acpi_os_read_pci_configuration ( | |
651 | struct acpi_pci_id *pci_id, | |
652 | u32 reg, | |
653 | void *value, | |
654 | u32 width) | |
655 | { | |
656 | return AE_SUPPORT; | |
657 | } | |
658 | ||
659 | void | |
660 | acpi_os_derive_pci_id ( | |
661 | acpi_handle rhandle, /* upper bound */ | |
662 | acpi_handle chandle, /* current node */ | |
663 | struct acpi_pci_id **id) | |
664 | { | |
665 | } | |
666 | ||
667 | #endif /*CONFIG_ACPI_PCI*/ | |
668 | ||
669 | static void | |
670 | acpi_os_execute_deferred ( | |
671 | void *context) | |
672 | { | |
673 | struct acpi_os_dpc *dpc = NULL; | |
674 | ||
675 | ACPI_FUNCTION_TRACE ("os_execute_deferred"); | |
676 | ||
677 | dpc = (struct acpi_os_dpc *) context; | |
678 | if (!dpc) { | |
679 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); | |
680 | return_VOID; | |
681 | } | |
682 | ||
683 | dpc->function(dpc->context); | |
684 | ||
685 | kfree(dpc); | |
686 | ||
687 | return_VOID; | |
688 | } | |
689 | ||
690 | acpi_status | |
691 | acpi_os_queue_for_execution( | |
692 | u32 priority, | |
693 | acpi_osd_exec_callback function, | |
694 | void *context) | |
695 | { | |
696 | acpi_status status = AE_OK; | |
697 | struct acpi_os_dpc *dpc; | |
698 | struct work_struct *task; | |
699 | ||
700 | ACPI_FUNCTION_TRACE ("os_queue_for_execution"); | |
701 | ||
702 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Scheduling function [%p(%p)] for deferred execution.\n", function, context)); | |
703 | ||
704 | if (!function) | |
705 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
706 | ||
707 | /* | |
708 | * Allocate/initialize DPC structure. Note that this memory will be | |
709 | * freed by the callee. The kernel handles the tq_struct list in a | |
710 | * way that allows us to also free its memory inside the callee. | |
711 | * Because we may want to schedule several tasks with different | |
712 | * parameters we can't use the approach some kernel code uses of | |
713 | * having a static tq_struct. | |
714 | * We can save time and code by allocating the DPC and tq_structs | |
715 | * from the same memory. | |
716 | */ | |
717 | ||
718 | dpc = kmalloc(sizeof(struct acpi_os_dpc)+sizeof(struct work_struct), GFP_ATOMIC); | |
719 | if (!dpc) | |
720 | return_ACPI_STATUS (AE_NO_MEMORY); | |
721 | ||
722 | dpc->function = function; | |
723 | dpc->context = context; | |
724 | ||
725 | task = (void *)(dpc+1); | |
726 | INIT_WORK(task, acpi_os_execute_deferred, (void*)dpc); | |
727 | ||
728 | if (!queue_work(kacpid_wq, task)) { | |
729 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Call to queue_work() failed.\n")); | |
730 | kfree(dpc); | |
731 | status = AE_ERROR; | |
732 | } | |
733 | ||
734 | return_ACPI_STATUS (status); | |
735 | } | |
736 | EXPORT_SYMBOL(acpi_os_queue_for_execution); | |
737 | ||
738 | void | |
739 | acpi_os_wait_events_complete( | |
740 | void *context) | |
741 | { | |
742 | flush_workqueue(kacpid_wq); | |
743 | } | |
744 | EXPORT_SYMBOL(acpi_os_wait_events_complete); | |
745 | ||
746 | /* | |
747 | * Allocate the memory for a spinlock and initialize it. | |
748 | */ | |
749 | acpi_status | |
750 | acpi_os_create_lock ( | |
751 | acpi_handle *out_handle) | |
752 | { | |
753 | spinlock_t *lock_ptr; | |
754 | ||
755 | ACPI_FUNCTION_TRACE ("os_create_lock"); | |
756 | ||
757 | lock_ptr = acpi_os_allocate(sizeof(spinlock_t)); | |
758 | ||
759 | spin_lock_init(lock_ptr); | |
760 | ||
761 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Creating spinlock[%p].\n", lock_ptr)); | |
762 | ||
763 | *out_handle = lock_ptr; | |
764 | ||
765 | return_ACPI_STATUS (AE_OK); | |
766 | } | |
767 | ||
768 | ||
769 | /* | |
770 | * Deallocate the memory for a spinlock. | |
771 | */ | |
772 | void | |
773 | acpi_os_delete_lock ( | |
774 | acpi_handle handle) | |
775 | { | |
776 | ACPI_FUNCTION_TRACE ("os_create_lock"); | |
777 | ||
778 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Deleting spinlock[%p].\n", handle)); | |
779 | ||
780 | acpi_os_free(handle); | |
781 | ||
782 | return_VOID; | |
783 | } | |
784 | ||
1da177e4 LT |
785 | acpi_status |
786 | acpi_os_create_semaphore( | |
787 | u32 max_units, | |
788 | u32 initial_units, | |
789 | acpi_handle *handle) | |
790 | { | |
791 | struct semaphore *sem = NULL; | |
792 | ||
793 | ACPI_FUNCTION_TRACE ("os_create_semaphore"); | |
794 | ||
795 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
796 | if (!sem) | |
797 | return_ACPI_STATUS (AE_NO_MEMORY); | |
798 | memset(sem, 0, sizeof(struct semaphore)); | |
799 | ||
800 | sema_init(sem, initial_units); | |
801 | ||
802 | *handle = (acpi_handle*)sem; | |
803 | ||
804 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", *handle, initial_units)); | |
805 | ||
806 | return_ACPI_STATUS (AE_OK); | |
807 | } | |
808 | EXPORT_SYMBOL(acpi_os_create_semaphore); | |
809 | ||
810 | ||
811 | /* | |
812 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
813 | * 'delete_semaphore()' function -- may result in an invalid | |
814 | * pointer dereference for non-synchronized consumers. Should | |
815 | * we at least check for blocked threads and signal/cancel them? | |
816 | */ | |
817 | ||
818 | acpi_status | |
819 | acpi_os_delete_semaphore( | |
820 | acpi_handle handle) | |
821 | { | |
822 | struct semaphore *sem = (struct semaphore*) handle; | |
823 | ||
824 | ACPI_FUNCTION_TRACE ("os_delete_semaphore"); | |
825 | ||
826 | if (!sem) | |
827 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
828 | ||
829 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); | |
830 | ||
831 | acpi_os_free(sem); sem = NULL; | |
832 | ||
833 | return_ACPI_STATUS (AE_OK); | |
834 | } | |
835 | EXPORT_SYMBOL(acpi_os_delete_semaphore); | |
836 | ||
837 | ||
838 | /* | |
839 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
840 | * improvise. The process is to sleep for one scheduler quantum | |
841 | * until the semaphore becomes available. Downside is that this | |
842 | * may result in starvation for timeout-based waits when there's | |
843 | * lots of semaphore activity. | |
844 | * | |
845 | * TODO: Support for units > 1? | |
846 | */ | |
847 | acpi_status | |
848 | acpi_os_wait_semaphore( | |
849 | acpi_handle handle, | |
850 | u32 units, | |
851 | u16 timeout) | |
852 | { | |
853 | acpi_status status = AE_OK; | |
854 | struct semaphore *sem = (struct semaphore*)handle; | |
855 | int ret = 0; | |
856 | ||
857 | ACPI_FUNCTION_TRACE ("os_wait_semaphore"); | |
858 | ||
859 | if (!sem || (units < 1)) | |
860 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
861 | ||
862 | if (units > 1) | |
863 | return_ACPI_STATUS (AE_SUPPORT); | |
864 | ||
865 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", handle, units, timeout)); | |
866 | ||
867 | if (in_atomic()) | |
868 | timeout = 0; | |
869 | ||
870 | switch (timeout) | |
871 | { | |
872 | /* | |
873 | * No Wait: | |
874 | * -------- | |
875 | * A zero timeout value indicates that we shouldn't wait - just | |
876 | * acquire the semaphore if available otherwise return AE_TIME | |
877 | * (a.k.a. 'would block'). | |
878 | */ | |
879 | case 0: | |
880 | if(down_trylock(sem)) | |
881 | status = AE_TIME; | |
882 | break; | |
883 | ||
884 | /* | |
885 | * Wait Indefinitely: | |
886 | * ------------------ | |
887 | */ | |
888 | case ACPI_WAIT_FOREVER: | |
889 | down(sem); | |
890 | break; | |
891 | ||
892 | /* | |
893 | * Wait w/ Timeout: | |
894 | * ---------------- | |
895 | */ | |
896 | default: | |
897 | // TODO: A better timeout algorithm? | |
898 | { | |
899 | int i = 0; | |
900 | static const int quantum_ms = 1000/HZ; | |
901 | ||
902 | ret = down_trylock(sem); | |
903 | for (i = timeout; (i > 0 && ret < 0); i -= quantum_ms) { | |
904 | current->state = TASK_INTERRUPTIBLE; | |
905 | schedule_timeout(1); | |
906 | ret = down_trylock(sem); | |
907 | } | |
908 | ||
909 | if (ret != 0) | |
910 | status = AE_TIME; | |
911 | } | |
912 | break; | |
913 | } | |
914 | ||
915 | if (ACPI_FAILURE(status)) { | |
916 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Failed to acquire semaphore[%p|%d|%d], %s\n", | |
917 | handle, units, timeout, acpi_format_exception(status))); | |
918 | } | |
919 | else { | |
920 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Acquired semaphore[%p|%d|%d]\n", handle, units, timeout)); | |
921 | } | |
922 | ||
923 | return_ACPI_STATUS (status); | |
924 | } | |
925 | EXPORT_SYMBOL(acpi_os_wait_semaphore); | |
926 | ||
927 | ||
928 | /* | |
929 | * TODO: Support for units > 1? | |
930 | */ | |
931 | acpi_status | |
932 | acpi_os_signal_semaphore( | |
933 | acpi_handle handle, | |
934 | u32 units) | |
935 | { | |
936 | struct semaphore *sem = (struct semaphore *) handle; | |
937 | ||
938 | ACPI_FUNCTION_TRACE ("os_signal_semaphore"); | |
939 | ||
940 | if (!sem || (units < 1)) | |
941 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
942 | ||
943 | if (units > 1) | |
944 | return_ACPI_STATUS (AE_SUPPORT); | |
945 | ||
946 | ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, units)); | |
947 | ||
948 | up(sem); | |
949 | ||
950 | return_ACPI_STATUS (AE_OK); | |
951 | } | |
952 | EXPORT_SYMBOL(acpi_os_signal_semaphore); | |
953 | ||
954 | #ifdef ACPI_FUTURE_USAGE | |
955 | u32 | |
956 | acpi_os_get_line(char *buffer) | |
957 | { | |
958 | ||
959 | #ifdef ENABLE_DEBUGGER | |
960 | if (acpi_in_debugger) { | |
961 | u32 chars; | |
962 | ||
963 | kdb_read(buffer, sizeof(line_buf)); | |
964 | ||
965 | /* remove the CR kdb includes */ | |
966 | chars = strlen(buffer) - 1; | |
967 | buffer[chars] = '\0'; | |
968 | } | |
969 | #endif | |
970 | ||
971 | return 0; | |
972 | } | |
973 | #endif /* ACPI_FUTURE_USAGE */ | |
974 | ||
975 | /* Assumes no unreadable holes inbetween */ | |
976 | u8 | |
977 | acpi_os_readable(void *ptr, acpi_size len) | |
978 | { | |
979 | #if defined(__i386__) || defined(__x86_64__) | |
980 | char tmp; | |
981 | return !__get_user(tmp, (char __user *)ptr) && !__get_user(tmp, (char __user *)ptr + len - 1); | |
982 | #endif | |
983 | return 1; | |
984 | } | |
985 | ||
986 | #ifdef ACPI_FUTURE_USAGE | |
987 | u8 | |
988 | acpi_os_writable(void *ptr, acpi_size len) | |
989 | { | |
990 | /* could do dummy write (racy) or a kernel page table lookup. | |
991 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
992 | return 1; | |
993 | } | |
994 | #endif | |
995 | ||
996 | u32 | |
997 | acpi_os_get_thread_id (void) | |
998 | { | |
999 | if (!in_atomic()) | |
1000 | return current->pid; | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | acpi_status | |
1006 | acpi_os_signal ( | |
1007 | u32 function, | |
1008 | void *info) | |
1009 | { | |
1010 | switch (function) | |
1011 | { | |
1012 | case ACPI_SIGNAL_FATAL: | |
1013 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1014 | break; | |
1015 | case ACPI_SIGNAL_BREAKPOINT: | |
1016 | /* | |
1017 | * AML Breakpoint | |
1018 | * ACPI spec. says to treat it as a NOP unless | |
1019 | * you are debugging. So if/when we integrate | |
1020 | * AML debugger into the kernel debugger its | |
1021 | * hook will go here. But until then it is | |
1022 | * not useful to print anything on breakpoints. | |
1023 | */ | |
1024 | break; | |
1025 | default: | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | return AE_OK; | |
1030 | } | |
1031 | EXPORT_SYMBOL(acpi_os_signal); | |
1032 | ||
1033 | static int __init | |
1034 | acpi_os_name_setup(char *str) | |
1035 | { | |
1036 | char *p = acpi_os_name; | |
1037 | int count = ACPI_MAX_OVERRIDE_LEN-1; | |
1038 | ||
1039 | if (!str || !*str) | |
1040 | return 0; | |
1041 | ||
1042 | for (; count-- && str && *str; str++) { | |
1043 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1044 | *p++ = *str; | |
1045 | else if (*str == '\'' || *str == '"') | |
1046 | continue; | |
1047 | else | |
1048 | break; | |
1049 | } | |
1050 | *p = 0; | |
1051 | ||
1052 | return 1; | |
1053 | ||
1054 | } | |
1055 | ||
1056 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1057 | ||
1058 | /* | |
1059 | * _OSI control | |
1060 | * empty string disables _OSI | |
1061 | * TBD additional string adds to _OSI | |
1062 | */ | |
1063 | static int __init | |
1064 | acpi_osi_setup(char *str) | |
1065 | { | |
1066 | if (str == NULL || *str == '\0') { | |
1067 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1068 | acpi_gbl_create_osi_method = FALSE; | |
1069 | } else | |
1070 | { | |
1071 | /* TBD */ | |
1072 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", str); | |
1073 | } | |
1074 | ||
1075 | return 1; | |
1076 | } | |
1077 | ||
1078 | __setup("acpi_osi=", acpi_osi_setup); | |
1079 | ||
1080 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
1081 | static int __init | |
1082 | acpi_serialize_setup(char *str) | |
1083 | { | |
1084 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1085 | ||
1086 | acpi_gbl_all_methods_serialized = TRUE; | |
1087 | ||
1088 | return 1; | |
1089 | } | |
1090 | ||
1091 | __setup("acpi_serialize", acpi_serialize_setup); | |
1092 | ||
1093 | /* | |
1094 | * Wake and Run-Time GPES are expected to be separate. | |
1095 | * We disable wake-GPEs at run-time to prevent spurious | |
1096 | * interrupts. | |
1097 | * | |
1098 | * However, if a system exists that shares Wake and | |
1099 | * Run-time events on the same GPE this flag is available | |
1100 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1101 | */ | |
1102 | static int __init | |
1103 | acpi_wake_gpes_always_on_setup(char *str) | |
1104 | { | |
1105 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1106 | ||
1107 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1108 | ||
1109 | return 1; | |
1110 | } | |
1111 | ||
1112 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1113 | ||
fb9802fa LY |
1114 | int __init |
1115 | acpi_hotkey_setup(char *str) | |
1116 | { | |
1117 | acpi_specific_hotkey_enabled = TRUE; | |
1118 | return 1; | |
1119 | } | |
1120 | ||
1121 | __setup("acpi_specific_hotkey", acpi_hotkey_setup); | |
1122 | ||
1da177e4 LT |
1123 | /* |
1124 | * max_cstate is defined in the base kernel so modules can | |
1125 | * change it w/o depending on the state of the processor module. | |
1126 | */ | |
1127 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
1128 | ||
1129 | ||
1130 | EXPORT_SYMBOL(max_cstate); | |
73459f73 RM |
1131 | |
1132 | /* | |
1133 | * Acquire a spinlock. | |
1134 | * | |
1135 | * handle is a pointer to the spinlock_t. | |
1136 | * flags is *not* the result of save_flags - it is an ACPI-specific flag variable | |
1137 | * that indicates whether we are at interrupt level. | |
1138 | */ | |
1139 | ||
1140 | unsigned long | |
1141 | acpi_os_acquire_lock ( | |
1142 | acpi_handle handle) | |
1143 | { | |
1144 | unsigned long flags; | |
1145 | spin_lock_irqsave((spinlock_t *)handle, flags); | |
1146 | return flags; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Release a spinlock. See above. | |
1151 | */ | |
1152 | ||
1153 | void | |
1154 | acpi_os_release_lock ( | |
1155 | acpi_handle handle, | |
1156 | unsigned long flags) | |
1157 | { | |
1158 | spin_unlock_irqrestore((spinlock_t *)handle, flags); | |
1159 | } | |
1160 | ||
1161 | ||
1162 | #ifndef ACPI_USE_LOCAL_CACHE | |
1163 | ||
1164 | /******************************************************************************* | |
1165 | * | |
1166 | * FUNCTION: acpi_os_create_cache | |
1167 | * | |
1168 | * PARAMETERS: CacheName - Ascii name for the cache | |
1169 | * ObjectSize - Size of each cached object | |
1170 | * MaxDepth - Maximum depth of the cache (in objects) | |
1171 | * ReturnCache - Where the new cache object is returned | |
1172 | * | |
1173 | * RETURN: Status | |
1174 | * | |
1175 | * DESCRIPTION: Create a cache object | |
1176 | * | |
1177 | ******************************************************************************/ | |
1178 | ||
1179 | acpi_status | |
1180 | acpi_os_create_cache ( | |
1181 | char *name, | |
1182 | u16 size, | |
1183 | u16 depth, | |
1184 | acpi_cache_t **cache) | |
1185 | { | |
1186 | *cache = kmem_cache_create (name, size, 0, 0, NULL, NULL); | |
1187 | return AE_OK; | |
1188 | } | |
1189 | ||
1190 | /******************************************************************************* | |
1191 | * | |
1192 | * FUNCTION: acpi_os_purge_cache | |
1193 | * | |
1194 | * PARAMETERS: Cache - Handle to cache object | |
1195 | * | |
1196 | * RETURN: Status | |
1197 | * | |
1198 | * DESCRIPTION: Free all objects within the requested cache. | |
1199 | * | |
1200 | ******************************************************************************/ | |
1201 | ||
1202 | acpi_status | |
1203 | acpi_os_purge_cache ( | |
1204 | acpi_cache_t *cache) | |
1205 | { | |
1206 | (void) kmem_cache_shrink(cache); | |
1207 | return (AE_OK); | |
1208 | } | |
1209 | ||
1210 | /******************************************************************************* | |
1211 | * | |
1212 | * FUNCTION: acpi_os_delete_cache | |
1213 | * | |
1214 | * PARAMETERS: Cache - Handle to cache object | |
1215 | * | |
1216 | * RETURN: Status | |
1217 | * | |
1218 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1219 | * cache object. | |
1220 | * | |
1221 | ******************************************************************************/ | |
1222 | ||
1223 | acpi_status | |
1224 | acpi_os_delete_cache ( | |
1225 | acpi_cache_t *cache) | |
1226 | { | |
1227 | (void)kmem_cache_destroy(cache); | |
1228 | return (AE_OK); | |
1229 | } | |
1230 | ||
1231 | /******************************************************************************* | |
1232 | * | |
1233 | * FUNCTION: acpi_os_release_object | |
1234 | * | |
1235 | * PARAMETERS: Cache - Handle to cache object | |
1236 | * Object - The object to be released | |
1237 | * | |
1238 | * RETURN: None | |
1239 | * | |
1240 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1241 | * the object is deleted. | |
1242 | * | |
1243 | ******************************************************************************/ | |
1244 | ||
1245 | acpi_status | |
1246 | acpi_os_release_object ( | |
1247 | acpi_cache_t *cache, | |
1248 | void *object) | |
1249 | { | |
1250 | kmem_cache_free(cache, object); | |
1251 | return (AE_OK); | |
1252 | } | |
1253 | ||
1254 | /******************************************************************************* | |
1255 | * | |
1256 | * FUNCTION: acpi_os_acquire_object | |
1257 | * | |
1258 | * PARAMETERS: Cache - Handle to cache object | |
1259 | * ReturnObject - Where the object is returned | |
1260 | * | |
1261 | * RETURN: Status | |
1262 | * | |
1263 | * DESCRIPTION: Get an object from the specified cache. If cache is empty, | |
1264 | * the object is allocated. | |
1265 | * | |
1266 | ******************************************************************************/ | |
1267 | ||
1268 | void * | |
1269 | acpi_os_acquire_object ( | |
1270 | acpi_cache_t *cache) | |
1271 | { | |
1272 | void *object = kmem_cache_alloc(cache, GFP_KERNEL); | |
1273 | WARN_ON(!object); | |
1274 | return object; | |
1275 | } | |
1276 | ||
1277 | #endif | |
1278 |